23 results
Hypomagnesemia - Etiologies by Mechanism

Decreased GI Uptake 
 - Poor dietary intake (particularly common in alcoholics)
inhibitors - Primary ... Medications - Loop ... abnormalities - Hypercalcemia ... - Hypokalemia ... Differential #Diagnosis #Low
Causes of Hypokalemia - Differential Diagnosis Algorithm
Defining the cause of hypokalemia starts by measuring urinary K
Differential Diagnosis Algorithm ... Clinicians should also look ... Renal K loss • Hypomagnesemia-induced ... Post-hypercapnia • Diuretics ... Hyperaldosteronism: malignant
Causes of Hypokalemia
Transcellular Shifts:
 - Alkalosis, Increased plasma insulin (treatment of diabetic ketoacidosis), ß-Adrenergic agonists, Hypokalemic
Causes of Hypokalemia ... anhydrase inhibitors, loop ... ), Primary hyperaldosteronism ... syndrome (mimics loop ... or induced) #Hypokalemia
Causes of Hypomagnesemia - Differential Diagnosis Algorithm
GI LOSS - FeMg < 2-2.5% or 24h Urine Mg
Differential Diagnosis Algorithm ... Urine Mg > 10g • Loop ... DiureticsHypercalcemia-PTH ... syndrome • Thiazide Diuretics ... #Magnesium #Low
Hypokalemia - Differential Diagnosis Algorithm
Extra-renal Losses:
 • Normal Acid-Base: Low intake
 • Metabolic acidosis: Gl tract
Diagnosis Algorithm ... High Aldosterone: Malignant ... secreting tumor, Primary ... • HTN Absent: Loop ... and thiazide diuretics
Metabolic Alkalosis - Differential Diagnosis Algorithm - Urinary Chloride
 • Cl- responsive metabolic alkalosis
- Urinary Chloride ... Remote use of loop ... - Normal/low ... Gitelman syndrome, Hypomagnesemia ... #causes #urinary
Increased Urination - Differential Diagnosis Framework - Increased Volume / Frequency
 • Increased osmotic load (Increased
urine (usually low ... kidney disease, Loop ... phase of ATN, Hypercalcemia ... Increased intake (low ... /Inflammation: Urinary
Causes of Metabolic Alkalosis - Differential Diagnosis Algorithm
GI Losses - Gastric
 • Vomiting
 • NG suction
GI
Differential Diagnosis Algorithm ... tubular transport • Diuretics ... (loop/thiazide) ... • Hypomagnesemia ... Aldosterone • Malignant
Treatment algorithm for malignancy-associated hypercalcemia.
Hypercalcemia
 - Renal Failure → Dialysis with low Ca++ bath
Aggressive IV hydration
Treatment algorithm ... for malignancy-associated ... Dialysis with low ... Volume Overload → Loop ... diuretic IV Bisphosphonate
Hypokalemia - Differential Diagnosis
Poor Intake 
 - Starvation
 - Anorexia
GI Losses 
 - Vomiting / NG
Hypokalemia - Differential ... Ureterosigmoidostomy Urinary ... Losses - Diuretics ... - Polyuria - Hypomagnesemia ... Differential #Diagnosis #Low